/**
 * Created by Administrator on 2016/4/5.
 */
var flag = true;
var chessBoard = [];
var wins = [];
var myWin = [];
var computerWin = [];
var over = false;
//棋盘初始化
for(var i=0;i<15;i++){
    chessBoard[i] = [];
    for(var j=0;j<15;j++){
        chessBoard[i][j] = 0;
    }
}

//赢法数组
for(var i=0; i<15; i++){
    wins[i] = [];
    for(var j=0; j<15; j++){
        wins[i][j] = [];
    }
}
var count =0;
//所有行赢的情况
for(var i=0;i<15; i++){
    for(var j=0; j<11; j++){
        for(var k=0; k<5; k++){
            wins[i][j+k][count] = true;
        }
        count++;
    }
}
//所有列赢得情况
for(var i=0;i<15; i++){
    for(var j=0; j<11; j++){
        for(var k=0; k<5; k++){
            wins[j+k][i][count] = true;
        }
        count++;
    }
}
//对角线赢的情况
for(var i=0;i<11; i++){
    for(var j=0; j<11; j++){
        for(var k=0; k<5; k++){
            wins[i+k][j+k][count] = true;
        }
        count++;
    }
}
//反对角线赢的情况
for(var i=0;i<11; i++){
    for(var j=14; j>3; j--){
        for(var k=0; k<5; k++){
            wins[i+k][j-k][count] = true;
        }
        count++;
    }
}
console.log(count);

//赢法统计
for(var i=0; i<count;i++){
    myWin[i] = 0;
    computerWin[i] = 0;
}

var chess = document.getElementById("chess");
var context = chess.getContext("2d");
context.strokeStyle = "#000000";
var logo = new Image();
logo.src = "assets/images/logo.png";
logo.onload = function(){
    context.drawImage(logo,0,0,450,450);
    drawChessBoard();
    drawPoint(225,225);
    drawPoint(105,105);
    drawPoint(345,105);
    drawPoint(105,345);
    drawPoint(345,345);
};

var drawPoint = function(i,j){
    context.beginPath();
    context.arc(i,j,4,0,2*Math.PI);
    context.closePath();
    context.fill();
}

var drawChessBoard = function() {
    for (var i = 0; i < 15; i++) {
        //纵线
        context.moveTo(15 + i * 30, 15);
        context.lineTo(15 + i * 30, 435);
        context.stroke();
        //横线
        context.moveTo(15, 15 + i * 30);
        context.lineTo(435, 15 + i * 30);
        context.stroke();
    }
};

var oneStep = function(i,j,me){
    context.beginPath();
    context.arc(15+i*30,15+j*30,13,0,2*Math.PI);
    context.closePath();
    var gradient = context.createRadialGradient(15+i*30+2,15+j*30-2,13,15+i*30+2,15+j*30-2,2);
    if(me) {
        gradient.addColorStop(0, "#0A0A0A");
        gradient.addColorStop(1, "#636766");
    }else{
        gradient.addColorStop(0, "#D1D1D1");
        gradient.addColorStop(1, "#F9F9F9");
    }
        context.fillStyle = gradient;
        context.fill();
};

chess.onclick = function(e){
    if(over){
        return;
    }
    if(!flag){
        return;
    }   
    var x = e.offsetX;
    var y = e.offsetY;
    var i = Math.floor(x/30);
    var j = Math.floor(y/30);
    if(chessBoard[i][j] == 0){
        oneStep(i,j,flag);
        chessBoard[i][j] = 1;
        for(var k=0;k<count;k++){
            if(wins[i][j][k]){
                myWin[k]++;
                computerWin[k] = 6;     //异常处理情况电脑为6不可能赢处于循环外的情况
                if(myWin[k] == 5){
                    window.alert("你赢了!");
                    over = true;
                }
            }
        }
        if(!over){
            flag = !flag;
            computerAI();
        }
    }
};

var computerAI = function(){
    var myScore = [];
    var computerScore = [];
    var max = 0;    //记录最高分
    var u = 0, v= 0;    //记录最高分的点的坐标
    for(var i=0;i<15;i++){
        myScore[i] = [];
        computerScore[i] = [];
        for(var j=0;j<15;j++){
            myScore[i][j] = 0;
            computerScore[i][j] = 0;
        }
    }
    for(var i=0;i<15;i++){
        for(var j=0;j<15;j++){
            if(chessBoard[i][j] ==0){
                for(var k=0;k<count;k++){
                    if(wins[i][j][k]){
                        if(myWin[k] == 1){
                            myScore[i][j] += 200;
                        }else if(myWin[k] == 2){
                            myScore[i][j] += 400;
                        }else if(myWin[k] == 3){
                            myScore[i][j] += 20000;
                        }else if(myWin == 4){
                            myScore[i][j] += 100000;
                        }
                        if(computerWin[k] == 1){
                            computerScore[i][j] += 220;
                        }else if(computerWin[k] == 2){
                            computerScore[i][j] += 420;
                        }else if(computerWin[k] == 3){
                            computerScore[i][j] += 11000;
                        }else if(computerWin == 4){
                            computerScore[i][j] += 100000;
                        }
                    }
                }
                if(myScore[i][j] > max){
                    max = myScore[i][j];
                    u = i;
                    v = j;
                }else if(myScore[i][j] == max){
                    if(computerScore[i][j] > computerScore[u][v]){
                        u = i;
                        v = j;
                    }
                }
                if(computerScore[i][j] > max){
                    max = computerScore[i][j];
                    u = i;
                    v = j;
                }else if(computerScore[i][j] == max){
                    if(myScore[i][j] > myScore[u][v]){
                        u = i;
                        v = j;
                    }
                }
            }
            console.log(u+"|"+v);
            console.log(computerScore[u][v]);
        }
    }
    console.log(u+"|"+v);
    console.log(computerScore[u][v]);
    oneStep(u,v,false);
    chessBoard[u][v] = 2;
    for(var k=0;k<count;k++){
        if(wins[u][v][k]){
            computerWin[k]++;
            myWin[k] = 6;                 //异常处理情况电脑为6不可能赢处于循环外的情况
            if(computerWin[k] == 5){
                window.alert("计算机赢了!");
                over = true;
            }
        }
    }
    if(!over){
        flag = !flag;
    }
};